* {
  box-sizing: border-box;
}

#titulo {
      font-size: 60px;
      text-align: center;
}

#material {
      font-size: 12px;
      text-align: center;
}


#barraestatica {
  position: fixed;
  top: 0;
  width: 98%;
  color: #fff;
  height: 40px;
  text-align: center;
  padding-top: 5px;
  /* Adds shadow to the bottom of the bar */
  -webkit-box-shadow: 0px 0px 8px 0px #000000;
  -moz-box-shadow: 0px 0px 8px 0px #000000;
  box-shadow: 0px 0px 8px 0px #000000;
  /* Adds the transparent background */
  background-color: rgba(1, 1, 1, 0.8);
  color: rgba(1, 1, 1, 0.8);
}

#barraestatica a {
	font-size: 14px;
	padding-left: 15px;
	padding-right: 15px;
	color: white;
	text-decoration: none;
}

#barraestatica a:hover {
	color: grey;
}


/* Create three equal columns that floats next to each other */
.columna {
  float: left;
  width: 12.5%;
  padding: 2px;
  /*height: 700px; /* Should be removed. Only for demonstration */
}

/* Clear floats after the columns */
.row:after {
  content: "";
  display: table;
  clear: both;
}

.tarjeta {
  
  float: left;
  width: 11.6%;
  font-size: 14px;
  padding: 2px;
  height: 550px;
  border:2px;
  border-style: solid;
  border-color: gray;

}

.tarjeta2 {
  
  float: left;
  width: 11.6%;
  font-size: 14px;
  padding: 2px;
  height: 370px;
  border:2px;
  border-style: solid;
  border-color: gray;

}


.espacio{
  
  float: left;
  width: 1%;
  padding: 2px;
  height: 550px;
}




p {
  text-align: center;
  font-size: 60px;
  margin-top: 0px;
}

#encabezado {
  text-align: left;
  font-size: 60px;
  margin-top: 0px;
}
#titulo {
      font-size: 60px;
      text-align: center;
}




#material {
      font-size: 12px;
      text-align: center;
}

#yvideo {

     font-size: 12px;
      text-align: center;

}

footer{
  text-align: center;
}